Method of manufacturing proofed paper bodies.



I. R. HARBECK.

NIETHD 0F MANUFACTURING PROOFED PAPER BODIES.

APPLICATION FILED .IAN 23,1911. l

Patented Feb. 29,1916.

2 SHEETS-SHEET I.

Patented Feb.29,1916.

2 SHEETS-SHEET 2- APPLICATION FILED JAN. 23,1911.

' sas .artnr ic.

TERVIS R. HARBECK, 0F DETROIT, MICHIGAN, ASSIGNOR T0 DETROIT CAN COMPANY,

OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

METHOD OF MANUFACTURING PROOFED PAPER BODIES.

Specification of Letters Patent.

Patented lFeb. 29, 319116.

Application led January 23, 1911. Serial No. 604,146.

To all whom it may concern Be .f-it known that I, JERvIs R. HARBECK, a citizen of the United States, residing in Detroit, in the county of 7Wayne and State of Michigan, have invented a new and useful Improvement in Methods of Manufacturing Proofed Paper Bodies, of which the following is a specification. l

My invention relates to improvements in the manufacture of waterproofedl paper or fibrous bodies for cans.

Heretofore in the Vmanufacture of convolute wound waterproofed can bodies, it has been customary to apply or introduce the asphaltum or waterproofing compound in a heated and liquid condition between successive layers or coils of the 'convolute wound paper body. or else to introduce it in a dryand powdered form between successive layers, and then subject the paper body to heat to fuse the asphaltum or water proofing compound. v Both these4 methods are more or less objectionable, and slow, expensive. and uncertain in operation, and both require a relatively large amount of asphaltum or proofing compound to be used. as it is applied 'directly to the porous and relatively coarse and thick paper or fibrous material of which the body or tube is made, and both require special machines or appliances. the former being liable to gum up and interfere with the operation of the body making or tube winding machine and the latter requiring a special heating and fusing step which may be more or less uncertain 01 defective in rendering the paper or fibrous body completely ilnpervious to passage of liquids or gases.

The object of my invention is to provide an improved method or process of manufacturing waterproofed or liquid and gas proot'ed paper or fibrous can bodies or tubes,

,by use of which the difficulties heretofore experienced may be overcome, the waterproofed bodies or tubes manufactured very rapidly and cheaply and rendered thoroughly impervious to passage of liquids or gases. and with a relatively small amount of asphaltum or proofing material, and without the necessity of special machines or appliances. The method or process I employ to practically accomplish this object or result. and this constitutes my invention. consists in introducing between the successive coils or layers of the paper or other fibrous tube material of which the body or tubeis formed, an extremely thin, dr solid, flexible, continuous filmA of asphaltum or proofing compound supported and embraced between two layers of thin, close paper which are firmly united thereto and secured together thereby, the thin paper exterior coating of the asphaltum or proofmg film adapting it to be glued or adhesively united to the coils or layers of tube material with which it contacts.

In practising my invention, the composite proofing layer or member of asphaltum film and thin paper is applied in the flat to the upper, adhesive-coated surface of the paper of fibrous material web as said web is being wound into the convolute paper body. The c'omposite proofing layer or member extends once around the paper body or tube and it maybe applied at any of the successive layers or coils of the tube. It is, however', preferably applied at one of the vintermediate layers or coils instead of at the outer or inner ones.

In practice, the web of paper or tube-material, coated upon one side with adhesive, is wound around the mandrel for one lor more layers, then the composite proofing layer is applied to the adhesive coatedface of the paper web, the winding mandrel being preferably stopped during this operation, and then'l the winding is continued, thus winding the composite adhesive layer around the body, and then the winding may be continued for one or more further layers,

if desired. In this way the paper bodies may be manufactured very rapidly and cheaply, and at the same time be thoroughly proofed against passage of liquids or gases therethrough. In this way it will be 0bserved,'however, that the composite proofing layer or member comprising` the asphaltum or proofing film and the two layers of thin close paper between which it is embraced and to which it is secured, is adhesively united upon one side or face only to the web of tube material, and that the paper body or tube is thus formed with an unglued surface or line of cleavage between one face of the composite proofing layer and the adjacent. face of the tube-paper web. But this in practice I find to be no objection, as the finished paper body is substantially7 as rigid, stifi` and strong as though all of its successive layers were glued or adhesively united together. The composite proofing layer or member, is, as before stated, preferably composed of a flexible, dry, solid, continuous and extremely thin film of asphaltum or proofing compound, embraced between and firmly secured to two other thin layers of paper; but if desired, my invention may be practised by having the thin paper upon one face onl)7 of the film of asphaltum or proofing compound, in cases where it is not desired or required that both faces of the composite proofing layer or member be of a character adapted to be glued or adhesively united to an adjacent layer. In the accompanying drawing forming a part of this specification, to enable my 1nvention to be more fully understood and practised by those skilled in the art, I have shown at Figure 1 a side elevation of a paper bodv winding or tube machine suitable for use inpractising my invention. Fig. 2 is a detail, vertical section showing the holder for the composite proofing layers or members. Fig. 3 is a perspective view illustrating a portion of the machine and showmg one of the composite proofinglayers or members applied to the upper adhesive material coated face of the web of tube material as it is being wound Iinto a paper body or tube. Fig. 4 is an enlarged detail cross section of a proofed paper body or tube as produced by my invention. Fig. 5 is a detail, perspective view of the composite proofing layer or member showing the film of asphaltum o1' proofing compound and the layers of thin, close paper, by which it is embraced, in part separated to better show its different parts. Fig. 6 is an enlarged detail cross section of the composite proofing layer or member. Fig. 7 is a cross section of a modified form of the composite proofing layer o1' member in which the film of asphaltum or proofing compound is coated upon one side only with a layer of thin paper.

The convolute paper body winding or tube machine used in practising my inven-.

tion may be of any suitable or well known construction. That which I prefer to employ, and which is indicated in Figs. 1 and 3 of the drawing, is substantially that shown and described in my Patent 862390 of Aug. 6, 1907, to which patent reference is made for a full showing and description of the tube machine.

In the drawing. 1 represents a roll of paper or other fibrous tube-material, the

continuous web -2 of which passes over the coating roller 3 by which the glue, paste or adhesive material from the vessel 4 is applied to one face of the web. The web 2 of paper, after passing over the coating roller 3 which applies a coating of adhesive material to its under surface, then lpasses around a tension roller 5 and roller 6 which brings its adhesive coated face uppermost,

.comprising a dry. solid, continuous film of asphaltum or proofing compound 11 embraced between and secured to two thin layers of paper 12. 13. one upon each face, are made long enough to extend once around the paper body, and the same are preferably contained in a movable magazine 1l which is raised and lowered at intervals as required to bring the lowermost proofing member 10 therein against the upper adhesive coated surface of the paper web 9., thereby sticking such lowermost proofing member to the paper web, so that. after the magazine is raised, it will feed forward with the web of tube-material and be wound around the mandrel between successive coils. layers or laminae. The magazine containing the proofing members or layers 10 may be raised and lowered as required by any suitable means. preferably by a lever .15. which is operated by a cam 16 through the connecting link or push rod 1T. After the winding is completed. the web of tube material '2 is severed by the customary shears: and the feed rolls T. S again advance the paper web 2 to the winding mandrel. and the operation is repeated. The thin paper 12. 13. to which the dry. solid. continuous film of asphaltum or proofing compound is united. serves to support the proofing film upon one or both sides, according as one or two layers of paper are employed. and also as a carrier to introduce the proofing film at any point desired in the lamination of the paper body or tube 18.

If it is desired that the water proofing layer be near the inside of the completed body or tube, the proofing member 10 is secured to the web or tube material at the earlier part of the winding operation. If the proofing layer is desired near the middle of the thickness of the paper body, it is applied to the web of tube material near the middle of the portion required for each body, and if it is desired to be located near the outer portion of the thickness of the convolute wound paper body, the proofing member 10 is applied near the end of the winding operation.

As illustrated in the drawing. the completed paper body or tube has a plurality of successive coils, layers or laminze 19 inside the proofing member 10, and a plurality of coils, layers. or laminae 20 outside the proofing member or layer 10.

In the drawing, the relative thickness of the tube-material layers and proofing member layer lis exaggerated for greater clearness of illustration, and this applies specially to the proofing film and the fibrous layers united thereto, all of which in practice are extremely thin.

I claim l. The herein described process for mak- 4ing impervious paper container bodies,

' tervals along the adhesive surface of the unwound portion of said sheet of tube material; and severing the sheet of tube material successively at the intervals between the separate proofing sheets.

2. The herein described process for making impervious paper container bodies, which consists in applying between two layers of thin porous paper, a thin film of fused impervious cement to form a thin compound proofing sheet adapted to be glued or adhesively united to a vlayer of'tube material, and providing a number of suchproofing sheets separate from each other; then intermittently winding a layer or sheet of tube material to form successive tubes, an adhesive being applied to a surface of the same; during said winding process intermittently applying said proofing sheets at separate intervals along the adhesive surface of the unwound portion of said sheet of tube material; and severing the sheet of tube material successively at the intervals between the separate proofing sheets.

JERVIS R. HARBECK.

Witnesses:

W. J. CULLEN, V. C. SNYDER. 

